Triglochin maritimum

Tracheophyta MagnoliopsidaJuncaginaceaeTriglochinTriglochin maritimum


A rhizomatous perennial herb of saline habitats. It is abundant in coastal and estuarine saltmarshes, flushed coastal rocks and cliff edges subject to sea spray, and the banks of tidal rivers. Inland, it occurs in brackish pastures as, for example, over saline Keuper beds in Cheshire, and at one site in Hampshire, in flushed turf on calcareous clay. Very rarely, it grows alongside salt-treated roads. Lowland.



World Distribution

Circumpolar Boreo-temperate element.

© Shannon, P

Broad Habitats

Littoral sediment (includes saltmarsh and saltmarsh pools)

Light (Ellenberg): 8

Moisture (Ellenberg): 7

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 4

January Mean Temperature (Celsius): 4.2

July Mean Temperature (Celsius): 14.3

Annual Precipitation (mm): 1181

Height (cm): 55

Perennation - primary


Life Form - primary




Clonality - primary

Rhizome shortly creeping

Comment on Clonality

"Yapp, J. Ecol. 5, p. 94, 1917. Clopla1 cites Rumex alpinus type, also slow."

Count of 10km squares in Great Britain: 837

Count of 10km squares in Ireland: 251

Count of 10km squares in the Channel Isles: 5

Atlas Change Index: -0.44

Weighted Changed Factor: -3

Weighted Change Factor Confidence (90%)


JNCC Designations


Atlas text references

Atlas (304a)
Davy AJ, Bishop GF
1991.  Biological Flora of the British Isles. No. 172. Triglochin maritima L. Journal of Ecology. 79:531-555.
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Lee JA
1977.  The vegetation of British inland salt marshes. Journal of Ecology. 65:673-698.